/* ffsdumper.cpp

Copyright (c) 2015, Nikolaj Schlej. All rights reserved.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

*/

#include "ffsdumper.h"

#include <fstream>

USTATUS FfsDumper::dump(const UModelIndex & root, const UString & path, const DumpMode dumpMode, const UINT8 sectionType, const UString & guid)
{
    dumped = false;
    counterHeader = counterBody = counterRaw = counterInfo = 0;
    fileList.clear();

    if (changeDirectory(path)) {
        printf("Directory \"%s\" already exists.\n", (const char*)path.toLocal8Bit());
        return U_DIR_ALREADY_EXIST;
    }

    currentPath = path;

    USTATUS result = recursiveDump(root, path, dumpMode, sectionType, guid);
    if (result) {
        printf("Error %zu returned from recursiveDump (directory \"%s\").\n", result, (const char*)path.toLocal8Bit());
        return result;
    } else if (!dumped) {
        removeDirectory(path);
        printf("Removed directory \"%s\" since nothing was dumped.\n", (const char*)path.toLocal8Bit());
        return U_ITEM_NOT_FOUND;
    }

    return U_SUCCESS;
}

USTATUS FfsDumper::recursiveDump(const UModelIndex & index, const UString & path, const DumpMode dumpMode, const UINT8 sectionType, const UString & guid)
{
    if (!index.isValid())
        return U_INVALID_PARAMETER;

    if (guid.isEmpty() ||
        (model->subtype(index) == EFI_SECTION_FREEFORM_SUBTYPE_GUID &&
            guidToUString(readUnaligned((const EFI_GUID*)(model->header(index).constData() + sizeof(EFI_COMMON_SECTION_HEADER)))) == guid) ||
        guidToUString(readUnaligned((const EFI_GUID*)model->header(index).constData())) == guid ||
        guidToUString(readUnaligned((const EFI_GUID*)model->header(model->findParentOfType(index, Types::File)).constData())) == guid) {

        if (!changeDirectory(path) && !makeDirectory(path)) {
            printf("Cannot use directory \"%s\" (recursiveDump part 1).\n", (const char*)path.toLocal8Bit());
            return U_DIR_CREATE;
        }

        if (currentPath != path) {
            counterHeader = counterBody = counterRaw = counterInfo = 0;
            currentPath = path;
        }

        if (fileList.count(index) == 0
            && (dumpMode == DUMP_ALL || model->rowCount(index) == 0)
            && (sectionType == IgnoreSectionType || model->subtype(index) == sectionType)) {

            if ((dumpMode == DUMP_ALL || dumpMode == DUMP_CURRENT || dumpMode == DUMP_HEADER)
                && !model->header(index).isEmpty()) {
                fileList.insert(index);

                UString filename;
                if (counterHeader == 0)
                    filename = usprintf("%s/header.bin", path.toLocal8Bit());
                else
                    filename = usprintf("%s/header_%d.bin", path.toLocal8Bit(), counterHeader);
                counterHeader++;

                std::ofstream file(filename.toLocal8Bit(), std::ofstream::binary);
                if (!file) {
                    printf("Cannot open header \"%s\".\n", (const char*)filename.toLocal8Bit());
                    return U_FILE_OPEN;
                }

                const UByteArray &data = model->header(index);
                file.write(data.constData(), data.size());

                dumped = true;
            }

            if ((dumpMode == DUMP_ALL || dumpMode == DUMP_CURRENT || dumpMode == DUMP_BODY)
                && !model->body(index).isEmpty()) {
                fileList.insert(index);
                UString filename;
                if (counterBody == 0)
                    filename = usprintf("%s/body.bin", path.toLocal8Bit());
                else
                    filename = usprintf("%s/body_%d.bin", path.toLocal8Bit(), counterBody);
                counterBody++;

                std::ofstream file(filename.toLocal8Bit(), std::ofstream::binary);
                if (!file) {
                    printf("Cannot open body \"%s\".\n", (const char*)filename.toLocal8Bit());
                    return U_FILE_OPEN;
                }

                const UByteArray &data = model->body(index);
                file.write(data.constData(), data.size());

                dumped = true;
            }

            if (dumpMode == DUMP_FILE) {
                UModelIndex fileIndex = index;
                if (model->type(fileIndex) != Types::File) {
                    fileIndex = model->findParentOfType(index, Types::File);
                    if (!fileIndex.isValid())
                        fileIndex = index;
                }

                // We may select parent file during ffs extraction.
                if (fileList.count(fileIndex) == 0) {
                    fileList.insert(fileIndex);

                    UString filename;
                    if (counterRaw == 0)
                        filename = usprintf("%s/file.ffs", path.toLocal8Bit());
                    else
                        filename = usprintf("%s/file_%d.ffs", path.toLocal8Bit(), counterRaw);
                    counterRaw++;

                    std::ofstream file(filename.toLocal8Bit(), std::ofstream::binary);
                    if (!file) {
                        printf("Cannot open file \"%s\".\n", (const char*)filename.toLocal8Bit());
                        return U_FILE_OPEN;
                    }

                    const UByteArray &headerData = model->header(fileIndex);
                    const UByteArray &bodyData = model->body(fileIndex);
                    const UByteArray &tailData = model->tail(fileIndex);

                    file.write(headerData.constData(), headerData.size());
                    file.write(bodyData.constData(), bodyData.size());
                    file.write(tailData.constData(), tailData.size());

                    dumped = true;
                }
            }
        }

        // Always dump info unless explicitly prohibited
        if ((dumpMode == DUMP_ALL || dumpMode == DUMP_CURRENT || dumpMode == DUMP_INFO)
            && (sectionType == IgnoreSectionType || model->subtype(index) == sectionType)) {
            UString info = usprintf("Type: %s\nSubtype: %s\n%s%s\n",
                itemTypeToUString(model->type(index)).toLocal8Bit(),
                itemSubtypeToUString(model->type(index), model->subtype(index)).toLocal8Bit(),
                (model->text(index).isEmpty() ? UString("") :
                    usprintf("Text: %s\n", model->text(index).toLocal8Bit())).toLocal8Bit(),
                model->info(index).toLocal8Bit());

            UString filename;
            if (counterInfo == 0)
                filename = usprintf("%s/info.txt", path.toLocal8Bit());
            else
                filename = usprintf("%s/info_%d.txt", path.toLocal8Bit(), counterInfo);
            counterInfo++;

            std::ofstream file(filename.toLocal8Bit());
            if (!file) {
                printf("Cannot open info \"%s\".\n", (const char*)filename.toLocal8Bit());
                return U_FILE_OPEN;
            }

            file << info.toLocal8Bit();

            dumped = true;
        }
    }

    USTATUS result;

    for (int i = 0; i < model->rowCount(index); i++) {
        UModelIndex childIndex = index.child(i, 0);
        bool useText = FALSE;
        if (model->type(childIndex) != Types::Volume)
            useText = !model->text(childIndex).isEmpty();

        UString childPath = path;
        if (dumpMode == DUMP_ALL || dumpMode == DUMP_CURRENT) {
            if (!changeDirectory(path) && !makeDirectory(path)) {
                printf("Cannot use directory \"%s\" (recursiveDump part 2).\n", (const char*)path.toLocal8Bit());
                return U_DIR_CREATE;
            }

            UString name = usprintf("%d %s", i, (useText ? model->text(childIndex) : model->name(childIndex)).toLocal8Bit());
            fixFileName (name, false);
            childPath = usprintf("%s/%s", path.toLocal8Bit(), name.toLocal8Bit());
        }
        result = recursiveDump(childIndex, childPath, dumpMode, sectionType, guid);
        if (result) {
            printf("Error %zu returned from recursiveDump (child directory \"%s\").\n", result, (const char*)childPath.toLocal8Bit());
            return result;
        }
    }

    return U_SUCCESS;
}
